CN1386010A - Method for realizing projection television by cold cathode field-emission plane display - Google Patents
Method for realizing projection television by cold cathode field-emission plane display Download PDFInfo
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- CN1386010A CN1386010A CN 01114930 CN01114930A CN1386010A CN 1386010 A CN1386010 A CN 1386010A CN 01114930 CN01114930 CN 01114930 CN 01114930 A CN01114930 A CN 01114930A CN 1386010 A CN1386010 A CN 1386010A
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Abstract
A method of cold cathode field emission panel display to realize project TV is to adopt a cold cathode field emission pane display as the projecting tube, centers of the display the lens and screen are on a same straight line with a distance b from the displayer to the lens and a gap a between the lens and the screen, the focal distance of the lens is f meeting the retationship of 1/a+1/b=1/f, the image amplified times is m=a/s. Images from the said displayer amplified directly project on the diffuse reflection semitransparent screen, reducing volume of project equipment's and increasing image brightness and sharpness.
Description
The present invention relates to a kind of method that realizes large-curtain projecting TV set, particularly utilizing cold cathode field-emission plane display to replace the cathode-ray projection tube is the method that optical element is realized large-curtain projecting TV set with lens.
At present, the Large Screen Display Technology method that is used to realize high definition TV mainly contains two kinds of Plasma Display (PDP) and cathode-ray projection tube back projection TVs (CRT rear-projection TV).Because plasma Display projector TV tech is based on the interior gas discharge principle of cell (Cell) that rib staggered between two-plate forms, drive circuit is difficult to integrated, is not easy to reduce machine volume, and the cost of components and parts is also high; And the barrier ribs grid between the pole plate of plasma display need reach thick film screen printing inferior surplus in the of ten, the technical matters complexity of large-scale industrial production, also increased labour cost relatively, so the plasma Display Technique exists complex process, outstanding shortcoming such as the high and power consumption of manufacturing cost is big.Cathode-ray projection tube rear-projection TV technology adopts the cathode-ray projection tube that installs size less (as 5 cun) in the bottom additional, forms image by mirror reflects to screen.Because cathode ray tube that projection tube adopts, its structure and volume itself is with regard to more complicated and have certain length, volume, so that integral body is occupied the space is bigger, install and use inconvenient; And, improve image brightness because projection tube adopts strong magnetic deflection field, and the energy of electron beam is higher, and the fluorescent material that brings thus comes off directly influences the useful life of projection television apparatus with Problem of Failure; The problem that is difficult to overcome more is that there is absorption at its two layer medium interface to projection light when adopting speculum, causes on the screen brightness of image not enough, makes the image obfuscation, and display quality is relatively poor.Shortcomings such as in a word, existing conventional projection TV technology ubiquity the theory structure complexity, and manufacture craft is not easy to integrated and scale, and machine volume is big, and it is many to take up room, and is not easy to flow, and the equipment cost height, and useful life is short.
The objective of the invention is to overcome the shortcoming that existing projection TV technology exists, seek to design a kind of method (or technology) of utilizing cold cathode field-emission plane display to realize projection TV.Adopt the carbon nano-tube flat-panel monitor to make the imaging light source, do not need electronic deflection, help reducing volume, raising display brightness and the projection imaging brightness of projection television apparatus; Adopt lens to handle image, reduce light losing, help increasing image brightness and definition, improve the screen picture quality as optical element.
In order to realize the foregoing invention purpose, the realization of the inventive method is mainly finished by the equipment that screen, lens and three parts of flat-panel monitor constitute, adopt cold cathode field-emission plane display to make projection tube, need not the colorimetric purity that shade mask structure guarantees image, the coloured image that just can form high brightness directly is used as the light source of projection TV.Field emission flat adopts matrix addressing, anode voltage is about 500V, as certain pixel (x, during y) by gating, the corresponding grid voltage of this pixel is 100V, forms the strong internal field of the 107V/m order of magnitude at cathode point, this electric field makes cathode point produce field emitted electron, electronics under anode voltage quickens bombardment (x, the y) fluorescent material of pixel makes it luminous.Because therefore the respectively corresponding cathode array in the red, green, blue district of each pixel the colour contamination phenomenon can not occur, does not need shadow mask that electronics is located yet.The image that is shown by cold cathode field-emission plane display amplifies through lens, directly projects on the diffuse reflection translucent screen, forms the high brightness visual image.Display, lens, screen three center are on same straight line, and display is b to the distance of lens, and lens are a to the screen spacing, the used focal length of lens is f, then should satisfy the relation of 1/a+1/b=1/f between the three, under this relation condition, the multiplication factor of image is m=a/b.The cold cathode field-emission plane display that is adopted can be chosen the commercially available prod of different cathode materials, and what wherein constitute negative electrode can be the pointed cone array of metal molybdenum, tungsten, Semiconducting Silicon Materials, carbon nano-tube, carbon fiber and diamond etc.The lens that adopted are the wide aperture convex lens, so that reduce the loss of light at minute surface.
The present invention shows with existing plasma or cathode-ray projection tube back projection TV is compared, owing to adopt the direct scioptics of cold cathode field-emission plane display to project image onto on the screen, saved equipment part, projection theory is simple, complete machine structure is simplified, and it is little to have a volume, the brightness height, the image color and luster is clear, outstanding advantage such as long service life.
Fig. 1 is for realizing the present invention's theory structure schematic diagram.
Implementing the used device of the present invention mainly is made up of display 1, lens 2 and screen 3, display 1 is the core component that the present invention realizes, can select cold cathode field-emission plane display for use, as 4 inches Si awl array cathode field-emitter displays or carbon nano-tube thin film cathode field-emitter display etc.Screen 3 is selected the diffuse reflection translucent screen for use, is the commercially available prod, and lens 2 can be selected commercially available wide aperture convex lens for use.
Embodiment 1:
Select the convex lens and the diffuse reflection translucent screen of above-mentioned routine for use, get 4 inches Si awl array cathode Field Emission Display, the matrix addressing based on the cathode strip and the screen bar of vertical interlaced is adopted in its addressing.By gating x bar negative electrode and y bar grid, feasible (x, y) cathode point of locating forms very high internal field, thereby emitting electrons, light (x, the pixel of y) locating is by the mode of matrix addressing, image just can project on the diffuse reflection translucent screen by convex lens by the Field Emission Display emission again, becomes the high-brghtness picture images clearly that is exaggerated several times.
Embodiment 2:
The device structure of present embodiment is identical with embodiment 1 with principle, only chooses the carbon nano-tube thin film cathode field-emitter display on display is selected.The effect of its projected image is also identical with embodiment 1.
Claims (1)
1, a kind of method of utilizing cold cathode field-emission plane display to realize projection TV, finish by the equipment that screen, lens and flat-panel monitor constitute, it is characterized in that adopting cold cathode field-emission plane display to make projection tube, display, lens, screen three center are on same straight line, display is b to the distance of lens, and lens are a to the screen spacing, and the focal length of lens is f, should satisfy the relation of 1/a+1/b=1/f, the image multiplication factor is m=a/b; The image that is shown by cold cathode field-emission plane display amplifies through lens, directly projects on the diffuse reflection translucent screen, forms the high brightness visual image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114930 CN1386010A (en) | 2001-05-16 | 2001-05-16 | Method for realizing projection television by cold cathode field-emission plane display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114930 CN1386010A (en) | 2001-05-16 | 2001-05-16 | Method for realizing projection television by cold cathode field-emission plane display |
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| Publication Number | Publication Date |
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| CN1386010A true CN1386010A (en) | 2002-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01114930 Pending CN1386010A (en) | 2001-05-16 | 2001-05-16 | Method for realizing projection television by cold cathode field-emission plane display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103313011A (en) * | 2012-03-14 | 2013-09-18 | 株式会社理光 | Image projection device and light/dark-level processing method |
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2001
- 2001-05-16 CN CN 01114930 patent/CN1386010A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103313011A (en) * | 2012-03-14 | 2013-09-18 | 株式会社理光 | Image projection device and light/dark-level processing method |
| CN103313011B (en) * | 2012-03-14 | 2016-08-03 | 株式会社理光 | Image projecting equipment and light/dark-level processing method |
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